Access function from public construct in php

Question

I have a php program where I have a function and a class with a public construct function in it, I need to call the function from inside the public construct as in code below :

class test {

    public $var0 = null;

    public function __construct() {

        $this->var0 = Tfunction('lol');

    }

}

function Tfunction ($String) {

    $S = ($String . ' !');

    return $S;

}

$j = new test();

echo($j);

when I run this it does not run the function, I tried evereything but it does not whant to put 'lol !' into my public variable, how could I get this to work?

One thing to note I dont get any errors telling me that the class cant access the fontion or anything like that, it just seems like the line is ignored away and $var0 is filed with null.

Answer 1

The error outputted when I ran your code was;

'Object of class test could not be converted to string'

There are 2 ways you can solve this problem, you can use either;

1. Instead of the line echo($j); change it to echo($j->var0);

Now instead of trying to print the object you are now printing the public variable from the object which was set in the constructor.

2. Add a __toString() method to your object, and use this to output the var0 field.

   class test {
   
     public $var0 = null;
   
     public function __construct() {
   
       $this->var0 = Tfunction('lol');
   
     }
   
     public function __toString(){
   
       return $this->var0;
   
     }
   
   }
   
   function Tfunction ($String) {
   
     $S = ($String . ' !');
   
     return $S;
   
   }
   
   $j = new test();
   
   echo($j);
   

Now when you try to print the object with echo($j); it will use the __toString() you assigned to output your variable.

Both of theses fixes mean that 'lol!' was outputted to my browser window, as was originally expected.